STIM2 is designed to deliver scientific stimuli with all the quality our customers have come to expect from Neuroscan.
Operating under Windows® XP, Stim2 provides a familiar and simple interface to design and deliver stimuli with ease and, more importantly, accuracy. Stim2 provides complete control of the experiment, while delivering the highest quality stimuli. Stim2, like the original STIM system, is a comprehensive stimulus presentation system consisting of a library of sensory, cognitive and neuropsychological tasks. It is a modern tool that provides well-
EEG/EP workstation, by providing synchronized trigger pulses. Stim2 is a contemporary version of the original system, with greater flexibility and ease of operation with a familiar Window’s® interface. Whether the user’s interests lie with basic sensorimotor and perceptual tasks, more complex recognition tasks, or the most sophisticated cognitive processes, Stim2 can deliver the stimuli with the precision needed for accurate analysis.
Task Library -
performance, Verbal learning, and Visual memory tasks.
Task Generation – Creating custom tasks with ease is the most important element in a stimulus program. The Gentask utility program provides an effective tool to create the user’s own tasks with no programming skills required.
Image and Sound Files -
Compatibility – Gentask files from the original STIM are read automatically in Stim2. Existing SND, CUT and PCX files from STIM are also read by Stim2, with no conversion required.
Data Analysis – Behavioral data (performance results) from the tasks are available for review in the Internet Browser, and the DAT file versions of these files can be transferred to SCAN for integration with the EEG data files (as with STIM).
The decibel level (SPL) for audio stimuli is adjustable by .75db steps, if you have the STIM Audio System Unit. The software only version requires a decibel meter for SPL measurement.
Integration –Stim2 will integrate with fMRI, ERP and other recording devices, allowing the user to trigger external devices (such as an SEP stimulator or MRI), or for external devices to trigger Stim2 (Stim2 with hardware version only). The seamless integration with Neuroscan data acquisition products allow on-
Gentask Editor – One of the most popular programs in STIM is the Gentask Utility program, since it allows maximum control over stimulus presentation. The heart of Gentask is a "sequence file", a line-
Stim2 features a Gentask Editor that makes creating and modifying sequence files much easier.
In the sequence file, the user can set the duration of presentation, the time allowed for a valid response, the interval between stimuli, the position of the graphics file on the screen, the decibel levels for audio files (independent left and right channel settings), the correct expected response, and the trigger type code sent to the acquisition system, for each stimulus that is presented. A new drag-
allows the user to add lines to the file with maximum ease. Additional options with the sequence file include flow control and conditional branching commands, counters, ways to build more complex stimuli, increasing/decreasing difficulty levels based on past performance, mask options, noise options, and many more.
The Stim2 Audio System and Response Interface
Each Stim2 Complete system is provided with precision hardware for recording sounds from a microphone or line input with 16 bit A/D conversion, playing back mono or stereo sounds at SPL calibrated levels (HL also possible), recording manual responses with push buttons or optional finger-